Sunderland's South Korean striker Ji Dong-won will miss the club's pre-season trip to his homeland after being called up to his country's squad for the London Olympics.
The 21-year-old, who has scored eight goals in 16 games for his country, will head to the London next month after being selected by coach Hong Myung-Bo.
The South Koreans reached the quarter-finals in both 1948 in 2004 and will play Mexico, Gabon and Switzerland in the group stage.
They will kick off against the Mexicans in Newcastle on July 26 and then face the Swiss in Coventry three days later before rounding off against Gabon - ranked 49th in the world by FIFA - at Wembley on August 1.
Ji joined Sunderland last summer from Chunnam Dragons, but has found his opportunities limited. He has only started two Premier League games, making 19 appearances as a substitute.
Sunderland take part in the Peace Cup in South Korea in July.
The club's vice chairman David Miliband, MP for South Shields, told Sky Tyne and Wear last month how important the trip was to raise the club's profile in Asia and attract potential sponsorship revenue.
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